/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "It_posix_container.h"
using namespace std;

#define STACK_SIZE (1024 * 1024)    /* Stack size for cloned child */
#define CHILD_FUNC_ARG (0x2088)

std::string gen_proc_pid_root_path(int pid) {
    std::ostringstream buf;
    buf << "/proc/" << pid << "/root";
    return buf.str();
}

static int opendirCheck(void)
{
    DIR *dir = opendir("/proc");
    if (dir == nullptr) {
        return -1;
    }
    closedir(dir);
    return 0;
}

static int childFunc(void *arg)
{
    int ret = 0;
    ret = opendirCheck();
    ICUNIT_ASSERT_NOT_EQUAL(ret, 0, ret);

    return 0;
}

static int testFunc(void *arg)
{
    int ret = 0;
    int fd;
    char *stack;
    char *stackTop;
    stack = (char*)mmap(nullptr, STACK_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
    stackTop = stack + STACK_SIZE;

    ret = opendirCheck();
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    ret = chroot("/system/etc");
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    ret = opendirCheck();
    ICUNIT_ASSERT_NOT_EQUAL(ret, 0, ret);
    fd = open("/PCID.sc", O_RDONLY);
    ICUNIT_ASSERT_NOT_EQUAL(fd, -1, fd);
    close(fd);
    sleep(1);

    auto pid = clone(childFunc, stackTop, CLONE_FILES | SIGCHLD, arg);
    int status;
    ret = waitpid(pid, &status, 0);
    ret = WIFEXITED(status);
    int exitCode = WEXITSTATUS(status);
    ICUNIT_ASSERT_EQUAL(exitCode, 0, exitCode);

    return 0;
}

static UINT32 Testcase(VOID)
{
    int ret = 0;
    char *stack;
    char *stackTop;
    stack = (char*)mmap(nullptr, STACK_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
    stackTop = stack + STACK_SIZE;

    int arg = CHILD_FUNC_ARG;
    auto pid = clone(testFunc, stackTop, CLONE_FILES | SIGCHLD, &arg);
    sleep(1);

    auto path = gen_proc_pid_root_path(pid);
    std::vector<char> buf(PATH_MAX);
    auto nbytes = readlink(path.c_str(), buf.data(), PATH_MAX);
    ICUNIT_ASSERT_NOT_EQUAL(nbytes, -1, -1);
    ICUNIT_ASSERT_STRING_EQUAL(buf.data(), "/system/etc", -1);

    int status;
    ret = waitpid(pid, &status, 0);
    ret = WIFEXITED(status);
    int exitCode = WEXITSTATUS(status);
    ICUNIT_ASSERT_EQUAL(exitCode, 0, exitCode);

    return 0;
}


VOID ItPosixContainer010(void)
{
    TEST_ADD_CASE("IT_POSIX_CONTAINER_010", Testcase, TEST_POSIX, TEST_CONTAINER, TEST_LEVEL0, TEST_FUNCTION);
}

